Service & Troubleshooting Guide #17-04-029
13 – 3 FVES Open / T13 FVES Open
issues with fuel valve proof of closure switch
CEI hot oil heaters use Fireye flame safeguard controllers as a key part of the heater's safety system.
Most CEI hot oil heaters manufactured 2009 and earlier featured the Fireye E-110 as standard equipment. Most hot oil heaters manufactured 2010 and later feature the newer YB-110.
Fuel Valve End Switch
The E-110 and YB-110 each display a slightly different message to indicate the same shutdown failsafe related to the hot oil heater's Fuel Valve End Switch (FVES).
This Service & Troubleshooting Guide from the CEI Service Dept helps to explain the safety circuits involved, and how to troubleshoot the most likely causes.